Factual error: When water starts flooding Brooklyn, the water floods the main road but never floods the side roads. (00:12:21)
Continuity mistake: When the President's car drives up to the Mario Bros, it has the US flag on the left of the car, but in the next shot, it is on the right of the car. (00:12:02)
Continuity mistake: When the construction workers walk over to Sergeant Kooperman, the one with a yellow shirt has mud on his shirt, but in the next shot, the mud disappears. (00:11:42)
Revealing mistake: When Sergeant Kooperman stops at the fire escape, he moves without moving his legs. (00:06:35)
Revealing mistake: After Mario retrieves his Plumber's Helper, he is briefly layered over Princess Toadstool. (00:16:26)
Revealing mistake: When the clogs splash on Sergeant Kooperman's face, the one from Mario's sink appears out of thin air. (00:07:50)
Audio problem: When Mario says, "Who cares?", he speaks with Luigi's voice. This also happens when he is surprised by the amount of time Sergeant Kooperman gives him and Luigi to unclog the sink. (00:05:19 - 00:07:41)
Continuity mistake: When the limousine drives down the street, it has the US and USSR flags on the front of the limousine, but when water pushes it back, the flags change to generic red and yellow flags. (00:12:19)
Character mistake: The title card says "Plummers Academy" instead of "Plumbers Academy."
